Cavalier Domenico Cresti di Passignano - 1611

Rome, Italy.
Observations in August and September 1611.
Number of drawings: unknown.
Attenuated eyepiece observation method.Ref.

Lodovico Cardi da Cigoli - 1611

Rome, Italy.
Observations on September 16, 1611, and February 18, to March 23, 1612.
27 drawings.
Attenuated eyepiece observation method.Ref.

Christopher Scheiner - 1611

Germany - Italy.
Observations from October 21, 1611 to June 1627.
70+ published drawings, perhaps 900 observations. (Several observation days were often included within one drawing.)
Refractors of different dimensions.
Observation methods: Pinhole projection, small mirror projection, attenuated eyepiece, eyepiece projection, and construction of special telescope with both lenses made of colored glass.
Location of original drawings unknown.
Drawing examples: 1,
2, 3.Ref.